Sorry for the slow response.....I'm not actually using black PVC......You can get black PVC from Savko, but when you look at the cost of the black PVC vs. white, and depending how much you need it isn't cost effective, plus the fittings are more as well, so it really adds up....Again I've been cheating......What I did was actually purchase "white" PVC and then head to Walmart and get the Krylon Fusion Paint for plastic and then I cut and dry fit and glue and then shoot the pieces with the paint.....It dries in roughly 15 minutes, but it's better to wait if your going to be glueing hard to fit pieces which sometimes I have to do.......It is also better to let them sit for a bit and it takes 7 days for a full hard cure.....If you rough it up within that time period it will scratch and chip, which has happened in places, but easy to touch up though......PVC glue and primer will make the paint bubble regarless, so that's why I recommend glueing before hand if possible......
Krylon Paint is safe, but highly recommend that if your going to paint and use any of the submerged parts in your system, that you do let them full cure and rinse them really well in water......the paint has been used for the past couple years in setups will ill effects......HTH